Eilidh had been missing since the explosion at the Ariana Grande concert on Monday night.
Man Guilty Of Trolling FM
A court's heard a man threatened to assassinate the First Minister because he "doesn't really like the SNP".
Christopher Stevenson, 26, posted "Think I might assassinate Alex Salmond" while watching a TV programme about him.
But, an American visitor to Scotland saw the message on the social networking site and contacted the police.
Fire safety security technician Stevenson, from Alexandra Gate in Glasgow's east end, told police it was a joke when they interviewed him before he was arrested.
Stevenson was convicted by sheriff Graeme Warner after trial at Glasgow Sheriff Court, of behaving in a "threatening or abusive manner which was likely to cause a reasonable person to suffer fear or alarm".
He told Stevenson: "I'm sure you must know we live in a fairly sensitive age when some people, typically young men do some pretty crazy things that older folk like me find almost impossible to comprehend".
The sheriff said although he accepted Stevenson meant it as a joke, had he been a Twitter user and seen the message he would have 'opened his eyes'.
He added: "I might even have gone so far as to contact the police - it wasn't a surprise to me in the least someone took that course of action".
The court heard from DC Paul Fraser who took Stevenson to London Road police office and interviewed him.
DC Fraser told the court that an American person visiting Scotland had seen the message and reported it to police.
Excerpts of the interview were read in court.
He was asked to give details about his involvement in the posting of the message online.
Stevenson told officers: "I posted on Twitter that I think I might assassinate Alex Salmond, there's not really much detail in that.
"It was a programme about SNP, Scottish Independence and whatnot, I posted it after that."
Asked why he posted it he replied: "I don't really like the SNP and I thought it would be funny but it's not funny because I'm sitting here.'"
Stevenson - who has no previous convictions - said he had no wishes to harm or assassinate Mr Salmond and that it was a 'joke'.
In evidence Stevenson said that to see his messages on Twitter his account has to be 'followed' and that his followers are friends and family members.
He said the comment was a joke for them, who know his sense of humour.
He told the court: "My followers are my friends, my sense of humour does get me into trouble because I'm standing here.
"They all thought it was funny. Someone has searched the key words Alex Salmond on Twitter and found my comment and it has been re-tweeted."
He told the court: "It was done as a joke, it's hard to explain to other people.
"My followers are my friends, they get it as a joke."
The sheriff deferred sentence for a year for Stevenson to be of good behaviour.
Laura has since been found in hospital with serious injuries but there have been no updates on Eilidh.
Unison members and activists will invite Health Secretary Shona Robison to their smash the pay freeze campaign event on Thursday.
A report could also see it move closer to allowing ministers to perform same-sex marriages.
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