Help for 3 Categories questions? v7.3.2

1. I can't relocate where someone posted a tip on how to hide the users ability to add a custom category.  If you know how to do that, mind sharing that tip again?
2. Speaking of user category adds, I see in Categories the "Pending Approval" link. Are all net new categories put in pending mode or is there an auto-approval setting I'm over looking? 

• Extra thought - what if user1 creates a new "cats and dogs" category and user2 creates a new "dogs and cats" category. Can an admin switch user2's entry to be the same as user1's without having to go deep editing in the module user2 created "dogs and cats"?

Thanks for an help on this!

For # question, I located the post by pranshank25 I was thinking of:

Edit your inc/js/jquery.webForms.js line 295 and change this

if ($input.attr('add_other') == 'true') {

to this

if ($input.attr('add_other') !== 'true') {

I suppose you could hide it with css too

Still looking for thoughts on question 2 and 3

It was a free modification by Modzz and he has removed it from his list; could be due to changes in 7.3.x.  I need to look into this if I decide to upgrade as I turned off users adding categories, who wants thousands of user added categories on a site?