Tazz, what great pictures you have! They are just too cute for words. The nice thing about having 2 bunnies of course is that they are great company for each other as well as for you....and twice the fun

Re your correspondence with Tom and calming Boy Boy and Girl Girl down.....that comes with age!!!
The only thing I can think of in the meantime to save your carpet is a trick I learned which may help....hopefully they are only concentrating on one area of the carpeting,like in a corner, so in that spot you put down a remanent on top of the good carpet and let them have a go at that. If they are really digging hard you might have to attach the remanent to a piece of plywood with heavy duty staples, the weight of the wood should keep it fairly well in place. The nice thing is that if you have company you want to impress you can just whip that remanent into the hall closet until the company goes home.

I really do NOT recommend the tobasico sauce, even diluted. I think that's asking for trouble with delicate bunny stomachs and their tentative bunny personalities.

RE the baseboard.....although it looks kind of tacky, I was advised to nail a piece of furring strip over the baseboards and just let them have a go at that. Then when you want, you can remove the furring strip and viola!!!! the baseboard returns. Mine guys quit chewing on the baseboards after a while and I just ended up coloring in the toothmarks with a permanent marker or Old English scratch stuff.

Did you ever find a gridded litter pan?
Just like a toddler, they WILL outgrow their bad habits....and develop other ones!!!!
As Roseanna Roseanna Anna Danna used to say, it's Always something!!!