Bots causing trouble?

[Jo555]

I checked the Webalizer stats and found some ip's created considerably more VISITS than others. I guess those are bots crawling my websites and they may be responsible for sometimes unexplainable sudden drops in CTR and eCPM. Am I right?

Do anybody have same sort of issues and how do you deal with them?

[leadegroot]

Its unlikely the bots are causing falling epc - its unusual for a bot to pull javascript, so they rarely 'count' in adsense stats

[Jo555]

Just confirmed the bots are from a spamming organization.
I don't know what they are doing on my website, but I believe they care nothing about my website and could do anything harmful.
So even if most bots wouldn't normally trig adsense, could they do?

[Gusgsm]

Ban them. They can suck up your bandwidth as quickly as that.

[Leonard0]

There is a bot-banning script at [webmasterworld.com ]

You might also consider banning proxies by checking server variables such as
"HTTP_FORWARDED"
"HTTP_X_FORWARDED_FOR"
"HTTP_VIA"
"HTTP_CONNECTION"
But this may also catch good proxy servers as well as open proxies.