Hi lemon you right but not all script I almost worked with all types of advance scripts.Mostly free scripts comes with a minor and major bugs if u r good in programming then you can make it bug free otherwise there will be lots of problem arise and all types of free social site scripts are come with different types of bugs.
Oh bad, I don't know any programming language, so I think if I ever need any scripts I should buy from any trustworthy source otherwise I will be in trouble with the bugs.