It's not just irresponsible young people that are to blame (they are). IMO all elderly should be at home right now, self quarantined, with no visitors, unless they are unable to get or afford deliveries for essential items (the government should be assisting on this). Even if they don't care about their own health (e.g. YOLO attitude that I've seen from elderly recently), their significantly higher potential need for a respirator and hospital bed is going to jeopardize our country's ability to handle this national health crisis.
The reason I bring it up is I am still seeing elderly people walking around, outside, as if nothing in this world has changed. Yes crowds and non-essential travel is irresponsible, everyone should be taking precautions... but the elderly (and the sick/at risk) especially should be on a very high alert right now (full 'duck and cover' mode), and I didn't see that from many I saw just today over at Cranes Roost here in Orlando.