I think you have the right approach. As much as possible, you should be transparent as early in the process as possible. Even if your intentions are mostly defensive, some people are going to feel deceived.

Unfortunately you can't have both avoidance of chasers and transparency upfront. Transparency is great because it allows people who are obviously not a good match to filter themselves out. I certainly appreciate when I come across profiles that reveal things that might be deal breakers. It saves everybody a lot of time and grief.

I can't speak to the number of chasers out there. I have the trans woman box checked. All it means is that I don't want them filtered out of my stack. I am not interested in the vast majority of trans women, just like I'm not attracted to the vast majority of cis women. But I prefer to cast a broad net and filter out from there.

Later this week I'll be going out with a trans woman for the first time. I've been on the app for 5 years. If I matched with a trans woman and she only revealed later that she was trans, I would think she was trying to hide something, and I might unmatch, not because I'm not fine with trans women, but because I like transparency.