i don't say this in a mean way but as a warning: if i have to look at your source code to try and find out what font you're using, you're probably infringing on the font's license. fonts also require credits. aside from being rude, most free fonts fall under creative commons and LEGALLY require credit
on a links/credits page should suffice! linking to the creator's site of choice is the best bet, but linking to where you downloaded the font from (such as a respository like dafont) should work if the creator's site is down
noting the credit in your code itself in addition to a link somewhere on your site is also a backup option just to be absolutely sure you're covering it
yes, even for personal use on hobby sites
where should we put credits? or should we refrain from using these fonts?
on a links/credits page should suffice! linking to the creator's site of choice is the best bet, but linking to where you downloaded the font from (such as a respository like dafont) should work if the creator's site is down
noting the credit in your code itself in addition to a link somewhere on your site is also a backup option just to be absolutely sure you're covering it