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Google is not ignorant.
In fact they are smart enough that other spammy sites which appear prominently in the link graph of the banned site have much more to fear than those which share the banned site's IP address.
I got this piece of information posted by Incubator in the searchenginewatch forums
does Google block entire IP ranges ? yeah.
the thresholds as to what frequency/ in what volumes you have to ping them is much higher than what you'd think but none the less...
not sure what their policy is for spamming their submission form, but I sure tripped their limits once or twice just by clicking too fast on SERPs ... heh. really.
it seems to carry risks, with no gains
( submitter software? uh, sure... )
so why do it from your server
if you insist on sumitting stuff to the world's no.1 crawler (...) do it with a client side software from the comfort of your own PC.
get your home/office IP banned instead of your servers'
first, I don't think that any ( often temporary ) ban Google puts on IPs when they query their front end too much would affect the crawling of websites on the same IP.
When the golden era rank checkers that used direct queries to Google's front end got banned ( and couldn't perform searches ) their crawling and rankings were unaffected.
Hence you got 25+ unworkable services for any related search ( for an online ranking checker site ).
Querying Google and spamming...
These are monitored by two completely different services / scripts.
I'd still consider this a problem ( a site in my neighborhood pinging Google extensively for no good reason ) and if I had proof that this IS in fact happening and could not ask either parties to put an end to it, I'd gather up my savings for a $2/month IP address add-on and/or move to a dedicated server.
Simply to avoid the attention of Google.
I'm an SEO btw *smirk*
[edited by: Miamacs at 1:41 pm (utc) on May 31, 2008]
For example, if you are running a ton of SEO reports and hit Google too often, it will block your IP address or a block of IPs for an amount of time.
However, if your domain is spamming Google with black hat techniques, Google will only penalize your domain, not the IP your domain sits on, as you can change IPs whenever you want.