If you're an ally of LGBTQIA+ people and want to indicate it with pins, flags, etc., I recommend avoiding the special ally flags (such as the one below) and instead using the same flags as LGBTQIA+ people themselves. I agree the ally flags are better than nothing, but for me, a big part of being an ally is making a group appear more common, normalising being open and proud about it, and maybe even drawing hate away from the group at the expense of my own well-being, although I haven't experienced that yet.
However, I would never falsely claim I belonged in a group textually or verbally. That would be lying.
(I'm trans and bi but just an ally of other LGBTQIA+ groups.)
Edit: Some aspects of the flag below (the "straight ally flag") can actually be worse than nothing, such as over half of its area being based on the homophobic black and white "straight pride" flag, and the letter "A" misleading people about the meaning of "A" in "LGBTQIA" (it's "asexual", not "ally").
#allyship #lgbtqia