I've had very few issues over the years, but maybe I'm just special (my mommy says I am). So I just wanted to see what other people are breaking at rallyxes that makes 99.9% of Subaru WRX owners afraid to try it.
I'll start...
Over the past 6.5 years of owning Subarus and rallyxing every one of them, driving them around in the rallyx field on a regular basis, blasting down rutted gravel roads in the mountains at up to 90 mph, and just generally driving them in all the ways that they were designed to be driven, I've had the following issues:
Car: 2001 Subaru 2.5RS
Problem: aftermarket camber bolt at left rear shifted at a rallyx and caused tire to rub strut
Cause: camber bolt was at partial adjustment setting, which guaranteed it to slip
Fix: removed aftermarket camber bolt and reinstalled non-adjustable factory bolt
Note: I now use the same camber bolts on all four corners of my 2000 RS due to issues with the 04 STi strut geometry, but they're set at full negative, so they haven't slipped - and they never will.
Car: 2001 Subaru 2.5RS
Problem: killed a pair of Konis at a rallyx school (both in the rear)
Cause: was using stock (soft) springs and cut bumpstops with rebound set pretty stiff on a severely rutted course, which bottomed them out repeatedly
Fix: stopped using Konis for rallyx
Car: 2000 Subaru 2.5RS
Problem: stuffed dirt into the bead of a rally tire at a rallyx
Cause: driving as if rally tires were impervious to bead stuffing
Fix: tried to stop driving like an ass (see below)
Car: 2000 Subaru 2.5RS
Problem: stuffed dirt into the bead of another rally tire
Cause: I drove like an ass again
Fix: sold the tires to Brian Herring after buying a different brand of rally tire.
Also played around in the field many times with Christine's previous car, a 2003 Honda Civic EX coupe, and never hurt anything.
So let's hear about the problems you've had, and why you've had them.