Considering it's google's app and they don't want it to be included with an unauthorized rom, that seems very fair. I really like Google in that respect. I like how my G1 is runing Cyanogenmod 5 and will be getting cm6 when it comes out and actually be running Froyo.
I can't see many groups being anti rom, because they already got your X dollars. Manufactures have you buying a phone, who cares how you use it, as long as you don't expect tech support.
The manufacture gets money, google should get the code or at least ideas, the phone company still gets to sell you a contract. As long as you aren't actively jailbreaking the phone, it should be ok by everyone. (if you jailbreak, then the phone company probably would start to fight it).
The only type of person who would try to fight this is the type of dirty company who would try to lock the version of the os so they can sell you a new phone next week with new bells and whistles only in the new OS... and apple..