You're the one who will likely get banned if you behave like that...
No one who roots their phone and plays with ROMs and Themes is provided any guarantee by any ROM/Theme developer...it's on you if you decide to play, and you need to understand enough about how to get out of trouble before you start, or failing that, ask questions respectfully if you need help.
That said, it should be simple to get your D2 up and running again.
IF you get to the Boot animation:
- Power up your phone
- As soon as the boot animation appears (after the M moto logo) pull the battery
- Power up again
You should go into clockwork recovery and can restore the backup you made before flashing the theme.
If you didn't make a backup or never get past the "M" motorola logo, follow the instructions below to SBF flash your phone.
Follow the instructions on the SBF thread, but for the first SBF file you flash, boot up your D2 into the boot loader by holding the up arrow on the keyboard while you hold the power button. Let go after the moto logo appears and the phone will be in boot loader mode - a few lines of white text on black background. Connect via USB and then start the flashing process.
Flash the second file (the much smaller one) following the instructions to use the notification pull down on the D2 and set the USB connection mode.
D2 SBF thread:
http://www.droidforums.net/forum/droid-2-rooted-help/76378-droid-2-sbf.html
Read the instructions all the way through a couple times first, before doing anything, and aside from my addition to get your D2 into boot loader mode for the first flash, follow them exactly.
You need battery power to do this - if you're not sure about battery level, turn off your D2 and plug it in - if the battery icon appears and it charges, let it charge until it's full to be safest.
If it doesn't charge, try the restore/SBF now, before wasting any more battery.
Relax, don't attack others, that's no way to get help.
