In one of my posts (Is a simple "context" a good start to ask questions?) I said
I've seen lots of people begin their questions with ...
where I used present perfect tense. Actually, I am not sure whether I used the right tense. Other options would present simple, past simple
I see lots of people begin their questions with ...
I saw lots of people begin their questions with ...
I was trying to emphasize the fact that there are indeed lots of people begin their questions in that way.
In this context, which tense should I use?