I wonder if you could start the blocks small and then grow them over time. If you have half an our reserved somewhere, maybe people won't schedule a meeting aga

I wonder if you could start the blocks small and then grow them over time. If you have half an our reserved somewhere, maybe people won't schedule a meeting against it. Then make it an hour, after a month and hour and a half, etc. Or just block out the four hours you need by filling it up with loads of fake important-sounding half-hour meetings.