Undesirable images in email subject line

Hi all,

Recently I have started getting more and more emails (e.g. from ebay) with annoying little glyphs / images in the subject line.  Is there any way to avoid these?

When I look at the source it shows the subect as (similar) to the following:

Subject: =?UTF-8?Q?=F0=9F=9A=9A_Order_update:_Item_Premuim_seed…?=

It seems that the ?UTF-8?Q?=F0=9F=9A=9A_ is translating to a picture of a little truck and I find it quite intrusive / distracting and annoying. 

thanks
Paul