And unless you're doing something really... bizarre... no one is going to spend their resources to DDoS your personal blog :)
The sad reality is that anyone running a website on the Internet these days is target for a DDoS, you only have to piss off the wrong somebody with 5 cents of sense and $50 of Bitcoin. Your personal website about birds you saw could get DDoSed by your neighbor who thinks you're lying about seeing more birds than him. To be clear, most sites will be unmolested and if it's a small personal site, just taking it down until the attacker gets bored is certainly one option. But if it's something business related you don't really have that option.
People be wilding out there man.
That's not ideal as it just shifts the problem to the gateway. Maybe NDN (named data network) could help if more routers support that.
I'm not worried about it from a normal usage standpoint. The website isn't interactive, I plan on being the only person with edit privileges on the wiki, for example. But I feel like based on things I've read, mostly on HN over the years, that this is opening a...different sort of box of worms than I already have open. Easier DDOS? Abuse of my image hosting, killing my monthly bandwidth allotment? I really don't want to have to set up a CDN just to host a wiki that is averaging less than one not-me viewer per month...
Am I paranoid, or just uninformed?