List of temporary incidences:

• SySCoin reached an all time high on Poloniex Feburary 21 when an announcement was awaited.
  But the same night BTC38 canceled withdrawals after requesting them or giving alerts "system busy"
  leaving customers who traded SYS on a dead end - Yet they fixed it when their service hours started.
  
• In the last few days Factom FCT faced very high volume for no apparent reason (50% of market capitalization per day)
  and all time highs.   http://archive.is/Pezyq (archived a bit too late)
  - Just before this Yuanboahui temporarily disabled withdrawals due to having to sync their Factom wallet.
  (source: https://www.yuanbaohui.com/news/detail/?id=834   [ 公证币 = notary credits = Factom ])
  They gave no update yet despite Factom being one of their biggest markets!  
  EDIT: Opening withdrawals was announced some hours in advance. (https://www.yuanbaohui.com/news/detail/?id=835 )
  
  

Thank you:)   Agreed, for the time being tho i will keep organizing all in the first two posts above - and wouldn't mind it to be sticky later in fact.
I'm curious if there were any such issues with the exchange in your signature since it is willing to add so many/unpopular coins easily - or how they avoided it.

I guess we should also notice which exchanges already did service in manual withdrawals after delisting VS. those who have a short delisting grace period and kept significant funds from delisted coins.       Guys, consider answering  if you were affected by the above  or remember anything similar, or simply want to vote/bump the topic