Tags like hetero and couple are ones that I'll admit to forgetting about (far more with the former), but I'll be sure to use them whenever I can going forward, in my own and other uploads I see.
OOZ662 said:
There's no real way to force people to use tags besides annoying the hell out of them or banning them. However, bringing the tags to mind by putting them in use and making them widespread tends to just naturally add them to uploader and tag gardener mental checklists. I've done so personally with two or three more minor tags in the past.
I can vouch for this. Constantly contacting people about how certain tags should work gets annoying on both sides, more when it's something visual and not subjective. So using said tags yourself often and hoping people see the proper usage is another way to go. While it's the same for incorrect usage, where others can get the wrong idea from misuse and spread that further, they can still be contacted and corrected.