Revoked Acceptance?

I read that colleges can revoke your acceptance due to a drop in grades. Does anyone know if top-tier schools actually do this? If I have gotten all A’s throughout high school but if I get a B or B+ in my accounting course for quarter 4 of this year would it be really bad? What if it is a B-? I am worried. (the final grade would then be B+ or A-)

Also for less selective schools?

Yes, they will and have.

You will not be rescinded for a B-. Just don’t get a D.

No F’s, D’s, or Felonies.

Or not more than 3C.