Allow me to push back on this a bit. People age cigars in humidors they open regularly. So it seems to surprising to me that cracking a jar once, for a few seconds, would stunt the aging process in any discernible way. Mind you, I can't speak from experience where aged pipe tobaccos are concerned. Still, I'm wondering if you're speaking more from a technical point of view than a practical one.
There are two forms (maybe more) of aging...
The Theory Behind Aging Tobaccco :: General Pipe Smoking Discussion - http://pipesmagazine.com/forums/threads/the-theory-behind-aging-tobaccco.20146/
One is when the tobacco is hanging in barns or in tightly packed bales... Which is similar to the fermentation process that happens in cigar leaf.
The other is tin-centric, which is when the microbes use the existing water and oxygen to form colonies, then when the air has been used up it within the vacuum.
If you pop the tin or open the jar, after the first colony of microbes have established, run it's course, and new fauna has set in to create the aging process, you have introduced an unknown element into the process.
These two processes are based on different things.
If someone is willing to risk unknown results or slowing the process by opening their tins or jars... then by all means, it is your tobacco.
Me? I haven't seen or experienced anything that would make me diverge away from my already established cellar etiquette of not touching tins or jars until I am ready to smoke them.
Of course the current trend of re-jarring tins and opening up tins has me weary enough of ever EVER buying a jar of aged tobacco. I have never been disappointed in a bought aged tin, by finding it has lost its seal. (knock on wood)_
But, by everyone re-jarring sealed tins, it will put a serious damper on future aged tins, IMO.