Comments by Senta (Top 1 by date)

Thanks for the comments, Tadit Dash. I do also validate my data on the server side.

Disabled JavaScript is consistent with my dummy test field staying at its default value. However, all the user fields are also always at their default values, which seems unlikely if there is a genuine submit. It also does not explain the 5 successive submits or the user agent always being the same.

I do also get genuine submits, where the fields have been changed, and the user agent varies.