@Izkata there is no precise porbability it can range from 0% to 100%, depends the user that is adding stuff... you have to sincere users of the app, and you will have the spammers,bored, or just "competitors" using the app and they might add thousands of nonsense just for "fun".. no?

i tried to vote up, but it didn't allow me coz of low reputation rank, thanks again

you're absolutely right, i guess i'll do that it sounds good. thanks a lot for the help :)

@Blorgbeard yeah it makes more sense. What about putting a limit on how much can a user input per day, you think its good/bad?