No, all are welcome. It depends on the time of day, too, who is asking and answering. Some learners may want a British flavor and some an American one. It depends on their needs.
I second that (except that I'd write 'flavo
ur'. ;-)
Some of us, speakers of both AmE and BrE and of other varieties, need to remind ourselves sometimes that what is absolutely true in our variety may not be so absolutely true in another variety. Learners generally cope well with the different varieties, and learn to pick what suits their needs best. The only times when problems arise is when one of us insists that our variety is right and the others are wrong.
For some reason, the majority of the people who respond regularly in this forum happen to be from the British sector. This doesn't matter. Some of our most valued gurus are American and Australian, and they help ensure that this forum provides a balanced view of English. We also have valuable input from speakers of other varieties of English, and from non-native speakers (some of whom give more helpful responses than some native speakers do).
So, as SoothingDave wrote, all are welcome.