I have had ATC caution me that for placement on very long straight in, I would have to maintain 160 knots to short final to fit in with other larger traffic, would I accept? I was flying a Caravan in one memorable case, which was capable, so I accepted, and no problem. I was informed, and given the choice in a controlled environment. In an uncontrolled environment, pilots have to increase their awareness, particularly pilots of aircraft which are obviously much faster than the types commonly known to use that airport. When I have flown faster types into smaller airports, I have been extra vigilant, and been certain to actually fly a larger circuit, so I was on the outside, looking in, with more space, a place to go to safely overtake if needed, and a good view of any slower traffic which could be ahead of me. Straight in affords none of these safety elements.