Don't you need log entries to satisfy the recency of experience requirements? I.e. - BFR, IPC, x inst. approaches within x months, x landings within x months, etc?
The answer to this question is you DO if you intend to exercise the privileges of a certificate or rating that require currency or recent experience.
Now for a BFR, (which, as a bit of trivia, isn't called a BFR anymore. It's just called a "Flight Review" which occurs every 24 calendar months. Part 61.56) there is NO time requirement. If a pilot walks in having not flown in 5 years and asks for a flight review, then we go ahead and do one. Now HIS flight review is going to be a LOT different than someone I see flying at the airport every week, as the purpose is to make sure the pilot can conduct a safe flight.
The FAA and the AOPA have all published articles about what type of information should be discussed during a flight review, but in the end it just boils down to the instructor. A minimum of one hour of ground and one hour of flight time and the signoff is legal.
As for an IPC, that too is just a demonstration of proficiency. Looking at a logbook just gives a CFI an idea about what kind of stuff the candidate has been doing, but it certainly doesn't reveal any level of skill. I've flown with 50 hour private pilots working on their instrument that could track a VOR radial better than a guy who shoots approaches weekly using his dual-axis autopilot slaved up to his suite of Garmin GPS's.
In the end it's got nothing to do with hours. It's how individually we choose to approach this pursuit of aviation. Some people will spend the rest of their lives hungry for information, always trying to learn as much as they can comprehend and then looking for more still. Chances are if you're here, in this forum, reading this post, then this is you and that's something to be proud of.
Others learn only what they need to get it off the ground and then dump it back on the ground when no one is looking.
It's the responsibility of every pilot...peer to peer, student to CFI, CFI to student, pilot to weather briefer...to always question the information we receive and benchmark it for validity against what we already know, and to call into question anything we suspect to be false.
Let your skills speak for who you are as a pilot...the logbook is for the Feds.
In closing, I try to remind pilots I work with that just becuse your logbook reflects a recency of experience, don't let that stand between you and your better judgement. Six instrument approaches in six months doesn't mean you're ready for an ILS to minimums with the visibility being reported in FEET
, not miles...