Thanks for all the replies. I understand the reasoning now, but at least in my case, it still doesn't really make sense for me to write on the paper log, for these reasons:
- it will often be raining, so the less time I have the log sheet out, the drier it'll keep.
- My family has found only about 10 caches so far, but in about half of them, the log sheet was wet. In one case, it was frozen in ice.
- I have absolutely no desire to win any prize or anything for accumulating caches. Therefore I have absolutely no desire to "cheat" and log a cache as found, when I didn't find it. (is there a prize or sense of status for accumulating caches? If not, why would anybody cheat?)
- If a geocaching administrator or someone like that says that because I didn't sign the log sheets, my found caches "don't count", I'd say "I don't care", because I'm not in this for money or status. As long as the website shows my found caches with the smiley-face icon, I'm happy.
Some more questions, after reading the replies:
- what's wrong with virtual caches?
- as a cache owner, why would you want to verify that people have signed the log sheet instead of trusting the online log? If there are armchair cachers who've cheated, that will inflate the number of finds. Is that bad?
- as a cache owner, if you find that there are online finds that don't have corresponding paper log entries, what do you do about it?