>He has his own account now and he can open UT by opening Opera. I guess, I can remove it from the list of open windows... But I think he would be able to type the address...
Perhaps - at this point - you should be in charge of the password, i.e., let him into the Universal Thread only under your supervision.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)