All, I see that I'm not the only person having this issue today...
We use Marketo forms on our website to capture any new leads requesting information or service. Over the weekend we received a high number of SPAM leads generated by bots. I'm currently going though the data to look for patterns I can use to filter out spam.
I'm aware that Marketo employs a hidden field that typically weeds out spam bots, but it looks like they've found a way around the filter.
If multiple users are experiencing spam issues all of a sudden, I implore Marketo to explore the issue and figure out a new way to filter out these spam bots.