I'm telling you that it's my condition to helping out that my contributions are properly respected in the commit history of the project. I'm pretty sure every single other developer contributing would see it the same way. I'm offering my work and if it's more important to you to not be a little annoyed in a rare use case than doing this the proper way then, well, then I know what to think about that.
Messy commits like the one you mentioned will of course be less frequent going forward and besides I think that's a particularly weak point. You see my username, you know who I am, you can see what the changes were. You're a programmer, you're dealing with data. If you're so annoyed by it, you can simply filter me out by username if there is anything in particular you want to check on.