Sorry mate but that vouch you gave him will make him look like a scammer =/. Giving a vouch to someone because they gave you something does not make him trusted.
Its not scamming at all. Just that giving names to someone for free does not make you trusted what so ever. Maybe train some accounts, sell something, buy something etc. Also, if you noticed that most people dont have vouches in their sig if they are on sythe for a long time, take me for example, im much more trusted then you, and yet i dont have vouches in my sig . Doesn't mean i havent done trades etc. Just make's you look more professional.
id like magehoodie, ill give a huge vouch. check and make sure that 69 u and me isnt banned, they banned my old account 69foursome69 because of vulgar name.