I would think that as long as there isn't a No Turn On Red sign then you should be able to make the right. Many times people just may be ignorant of certain rules but we've all had our moments and I think we all could be a little more tolerant at times.
Same thing when people stop for a school bus with it's stop sign out on the opposite side of a double yellow line like on Nameoki or Maryville rd. In this instance you are not required to stop but many people do it anyway because they are unknowing or unsure.