Wales players will receive social media training ahead of this summer's European Championships, manager Chris Coleman has revealed.
Coleman was speaking after claims Liverpool's Wales Under-21 midfielder Jordan Williams mocked the Munich air disaster during the Europa League match at Manchester United.
A tweet sent from the 20-year-old's Twitter account, responding to a video of Liverpool fans celebrating inside Old Trafford after a 1-1 draw confirmed their progress into the quarter-finals, depicted an aeroplane emoji and pair of hands clapping.
Eight United players were among 23 who died in a crash at Munich Airport in 1958 and some Liverpool fans have been known to taunt their arch rivals with a song and aeroplane gestures.
The tweet was quickly deleted and Williams - who was called into Coleman's senior squad for Euro 2016 qualifiers against Cyprus and Israel last September - later apologised, claiming his account had been compromised.
Liverpool have subsequently said they wanted to establish the facts surrounding the Williams incident before deciding whether to make any comment, but Coleman feels the episode highlights the dangers of social media.
"Jordan's a nice boy and I hope it's the case that his account has been hacked," Coleman said.
"But it just goes to show these days you have to be very careful with social media.
"I always worry about social media and how things are portrayed and said. It can be a powerful tool but it can also be a dangerous one.
"You've got to be so careful, say something on social media that's misinterpreted or you step over the line and you're in trouble."
Wales start their pre-Euro 2016 campaign in earnest next week with two friendlies against fellow finalists Northern Ireland and Ukraine.
Northern Ireland visit the Cardiff City Stadium on March 24 before Wales play in Kiev four days later.
"This camp is the first time we are going to have meetings about situations other than the games," Coleman said.
"That's new for us and them. There's lot of 'don'ts' and 'can't happens'.
"Social media is so powerful that we've got to get it right. You can't be with them 24/7 but there's certain things we've got to cover with them.
"It's going to be tricky, but they've got to know what they can and can't do.
"If we could ban it, it would make our life easier, but I'm not sure we can.
"But I will say 'Be sensible, be aware' because one little mistake can create a lot of problems for the individual, and you don't want that because you want to concentrate on the football."
Gareth Bale will miss both games following talks between Wales and his club Real Madrid.
The 26-year-old has played only 281 minutes since Zinedine Zidane became Real coach in January because of calf problems and Bale's partner is due to give birth to their second child next week.
But Coleman is confident Bale, who scored seven goals in Euro 2016 qualifying to steer Wales to their first major tournament in over half a century, will put his injury misery behind him ahead of the finals in France.
"We don't think this is going to go on and on and on with him," Coleman said.
"He's just had a period where he's had a few problems. You can never tell and there's no guarantee, but we expect him to be okay (for Euro 2016).
"If he's there on the 10th of June (Wales' opening game against Slovakia) and says 'I'm feeling good' then that's what matters.
"I think these two weeks will help him. If he comes with us he's going to train every day and then play, and that's another little obstacle which he has to get over and we don't need.
"So why take the gamble? In another two or three weeks I think we'll see he's fine and hopefully he'll finish the season well."
Source: PA
