If you don't say what you mean, we assume you mean what you say.
As an example of the "by X I mean Y" people, take the guy who, when I complained about their anti-feral stance or something, went "oh 'anthro' means anyone who does things like talk, so You're Anthro and therefore have no cause to complain", despite that being /blatantly not what it means/ in a furry context.
(and the answer to this isn't "well just stop taking words to mean what they mean, Ylf", it's "say what you actually fucking mean, not something subtly but very importantly different".)