[Dan_SF]

There is a "New Posts" link which lists all posts since (y)our/my last visit.
And if people are interested in your post, they will see it there and click on it.

If you post multiple threads with the same name under other categories, i would consider that as Spam and wont open it at all.

Anyway, would you want to open multiple threads, and forget that you have opened them ?

And when do you want to stop ?
What if people do not respond immediately ? would you want to open the same amount of threads every day, just to be noticed, while people set you on ignore ?

One is really enough.