Whilst it is easy to make that conclusion trout I am appalled by some of the crap young people write. Whilst I'm far from an expert writer some have no grasp of the English language what so ever. It could just be a young seller who is either dumb, ignorant and/or a plain and simple "insert profanity of your choosing".
I agree with trout here, his favour of infinitives and lack of particles indicates that he has learned English but has had very little practice with it. With an exception of his attempt to form 'weighed', there is very little evidence of practical experience with the English language.
If he was just a dumb or ignorant English speaker, he would be using conjugated verbs.