Joke about blowing something up on Twitter, get arrested
telegraph.co.uk
telegraph.co.uk
Could it be that you simply remember those which happened in your lifetime better than those that happened before?
As a FWIW note, Wikipedia has 3 incidents between 1800-1899, 9 for 1900-1969, and markedly more after that (around 30-40, I didn't count). The world has changed. And/Or, reporting has changed. I'd go with the former.