You need to do a bit more reading in the subject - but I get the sense from your post that you're not some hairy, wart-encrusted troll... so I'll dignify what appears to be an honest question with a civil response.
COMPUTERS - I have one. They don't take away your DIR decoder ring for diving with one. Its in gauge mode 99% of the time. At no time does my computer manage my dive. We are taught not to wholly depend on one - specifically, plan each dive before we hit the water, remain aware of our loading, gas supply and average depth throughout the dive, and manage situations accordingly. The altrernative being hop in, swim around a bit until the magic box goes BEEP, then come back. Not good.
SPLIT FINS - There is a precision we strive for with blade fins that is often (<- disclaimer for those of you who can be precise with splits... I never could) not achieved with split fins.
Don't hop right to the apparent "restrictions" and get hung up on the stuff you thing DIR divers do not (or "can not") use, equipment wise. I have found my diving to be much more enjoyable and liberating since I drank the koolaid - not more restrictive and oppressive.
Dive with us. Talk with us. Read the Fundies book. Don't formulate your opinions of DIR and DIR divers from this or any other internet forum exclusively.
K