I have a dump of djvu documents and I was looking for an indexing tool for a long time to make use of this collection. Finally I was able to configure it on my desktop using regain. I have it configured on my desktop and accessible over the internet. If you want to try it out let me know in the comments and I can send across a private url for you to access it.
Checkuser abuse on English Wikipedia
Checkuser can investigate your IP address and Useragent which is stored for a period of 90 days.
Checkuser rights have been abused previously resulting in removal of admins. For one, you may follow the arbitration case which was referred to in a news paper article that correctly concluded that linking account to real people is pure speculation. Another admin was removed for abusing the system in collusion with other favourable admins.
There is a wiki where checkuser may track information on SPI cases. The data thus generated is not subject to the 90 days restriction although this is against the terms of usages. Some CU, like Bbb23, maintain a personal vault of data, which is again, against the privacy policy. Some CU like DoRD and Bbb23 are known to engage in fishing routinely; fishing means checking CU data without proper justification as mentioned in terms of usage.
Who is a meatpuppet?
When you bring in your friends or family to support your position in a discussion they are called meat puppet. This often happens when you feel that more people expressing similar opinion will give your stand a better chance of prevailing. That is usually the case in real world, but sadly, it is counter productive on Wikipedia. Sudden appearance of new editors with little or no editing history in the same discussion is treated very suspiciously. In fact, it is often the case that such users are treated as sock puppet for the purpose of enforcement of any blocks.
It is impolite to accuse some one to be a meat puppet of another user. Unless you see a deception being played out there is no reason to hurl such accusations. The guidelines pertaining to meat puppets are documented in a Wikipedia policy here: WP:MEAT.