I imagine it would be quite easy to use a seedfinder discreetly during a run. Is this a valid concern?

I mean I just don't see the point, it's not like you win prizes or money for having the best time, its merely just a site to compare your times to yourself and monitor improvement, and see if you can maybe score a top place on the board. I never even considered cheating because it would just ruin the fun of the run and make me feel so pathetic. Verifiers can sense somethings up if the player bee lines directly towards all the bosses in a random seed without changing direction or analyzing surroundings.