seatbelts cause more accidents

Risk Compensation vs. Selective Recruitment.

The record of mandatory seat belt use in countries is of complete failure to show anything like the previously predicted savings of lives. The risk compensation hypothesis argues that this is because drivers adjust their behavior in response to a perceived change in their own personal endangerment. Thus an increased sense of security can lead to a decreased sense of caution such that any safety benefit is consumed as an increase in speed or some other performance. To quote directly from one author on risk taking behavior "… creating the illusion of controlling traffic accident consequences with technical features such as seat-belts, ABS, four-wheel drive, helmets, etc. will seduce people to show more risky, thoughtless or even careless behavior."
The case in Ireland
The effect that was seen in traffic fatalities was of a steady increase in deaths throughout 1982 and continuing into 1983. It is reported that by the first quarter of 1983 traffic deaths had shown an increase of 46.7% compared with the same quarter the previous year, before the introduction of the fines (Adams 1985). As one researcher has put it; "... to compel a person to use protection from the consequences of hazardous driving, as seat belt laws do, is to encourage hazardous driving. A fine for non-compliance will encourage seat belt use, but the fact that the law fails to increase people's desire to be safe encourages compensatory behavior."

so basically.....if u buckle up you are more likely to kill timmy while he crosses the road, or hit that asshole infront of you for speeding up and slowing down.....just cause no harm will happen to you, whereas the potential for thier harm is infinite...