In the waning days of the Clinton presidency, the "roadless rule" was introduced to limit usage of the national forests in those areas declared to be "roadless". There was widespread belief that this was a first step toward declaring these areas as "wilderness". A wilderness designation excludes all machinery including bikes, hang gliders and of course 4x4s.
The rule got into a discussion of inventoried and non-inventoried roadless areas. An inventoried roadless area meant that they had an inventory of the roads in the area. What? An inventory of roads in a roadless area? Yep. No wonder folks ask for translations.
Another issue with the roadless rule was that it centralized designations so that the Ranger in the field didn't make a decision as to whether there was a road or what it was used for, Washington would do that. All local input was squelched, including public comment by the real owners of US Forest Service lands. The decision was made by Executive Order which helped to bypass the public input.
It was argued against by all the 4 wheel drive organizations (including United Four Wheel Drive Associations and the Mid Atlantic Four Wheel Drive Association).
From an access point of view, the consequences were obvious. There are also issues with the practice of good forestry as the roadless rule eliminated maintenance (such as thinning of underbrush) which has been cited as being a major contributor to the intensity and frequency of the forest fires in the years since its introduction. You may have noticed that USFS budgets have been severely strained in recent years as fire suppression is consuming all of their resources.
This has a spiral effect as the absence of budget dollars will contribute to a lack of maintenance which will contribute to road closures (under the guise of 'can't keep it open if we can't maintain') which will force those of us who use the forests onto fewer and fewer legally open areas. The effect of that will lead to complaints of overuse to the detriment of the forest and the environment (as well as helping to push the non-law abiding into creating illegal off trail paths). This will add to the collection of information to be used to keep the land-owning public off their own land.
I'll stop now but it should be a little easier to see why some can get seriously riled up at the mere mention of that particular President and the Roadless Rule.