Yes, and if you're trying to save every penny, that's reasonable. Brother doesn't prevent you from doing this, you just have to look up the toner counter reset process, which is trivially found online.

It's exceedingly unreasonable for something like a small office printer to have people constantly reprinting things because the toner is almost, but not entirely out, so please remove the cartridge, shake it gently, etc. Remember, the paper you're spending on partial prints and the toner you're applying isn't free either, and people's time isn't, either. Neither is the carpet cleaning of the toner spot in front of the printer from people trying to stretch it.

I'll reset the counter on mine, give it a shake, and run it until I see any impact on printing, but as soon as I notice any streaking, I just replace the cartridge. It's not worth the hassle to fight for 100 pages of toner to me at this point in my life.