The worst (best?) possible odds of someone landing in the middle of the "socially isolated/sociopath + suicidal" and "smart enough to use newly simplified genetic technology" venn diagram is 1 in 8 billion-ish. I'd put money on there being more than that if I thought I would survive to collect.
I was (pleasantly!) surprised that nobody from ISIS traveled to Africa during the Ebola epidemic to infect themself, then flew back to NYC to hang out in Times Square. Doesn't require much brains, just the willingness to commit suicide and the motivation to kill a bunch of people, both of which ISIS had in spades.
