A thought occurred to me the other night, while I was more or less asleep, that seemed like a revelation. In the light of day it seems less exciting, and less certainly true. But, as I have to keep reminding myself or else I will never post anything, this is only a blog. It is just the place for these possibly significant but probably nothing thoughts. So here it is.
A philosopher's not being a member of any community of ideas is the other side of the coin that says to talk ethics is to run against the boundaries of language. In a community of ideas people think, speak, and behave in similar ways. Not to be a member of any such community is not to go along, not to join in. Of course (or: presumably), a philosopher so defined might go along here and there, or now and then, but accidentally, not out of conformity. This does not guarantee running against the boundaries of language (if we recognize such things as existing in the first place), but it does suggest unconventional movements within any such boundaries, and probably increased likelihood of running against them. It will not be conventional thinkers who run against these boundaries.
Another thing I would assume is that a philosopher will not run against the boundaries of language just for the sake of it. Rather, he or she will take their cue not from society or convention but from something else, and this is what will cause the unconventional thinking/speaking/behavior. If this something else is a voice in one's head, say, then the results might not be good. But if it is what you might call God or Nature then perhaps it will be.